Electrode.



R. H.' WOLFE.

ELECTRODE.

APPLICATION FILED an, 14, 1910.

Patented Oct. 25,1910.

THE NORRIS PZTIRS '30., WASHINGTON. n. c.

, RAPHAEL H. WoLrr, on NEW YORK, N. Y.

ELECTRODE.

Specification of Letters Patent.

Patented Oct. 25, 1910.

Application filed January 14, 1910. Serial No. 538,018.

T 0 all whom it may concern:

Be it known that I, RAPHAEL H. IVOLFF, a citizen of the United States,residing at New York city, county of New York, and State of New York,have invented new and useful Improvements in Electrodes, of which thefollowing is a specification.

My invention relates to electrodes made of carbon mixtures usedprincipally for electrometallurgical operations. Such as are used inelectric furnaces have to be of large dimensions and it is diflicult tobake them in such a way so they are heated uniformly, and alsodiificultto expel the gases that form in the interior during the processof baking. To heat them sufficiently so the core of such largeelectrodes will be as thoroughly baked as the exterior and expel thegases completely involves a danger of spoiling the product. In order toovercome these diliiculties I have devised a carbonelectrode of two ormore pieces each of them made separately.

This invention is set forth in the following specification and claimsand illustrated in the annexed drawing in which- Figure 1 represents alongitudinal section of an electrode embodying this invention. Fig. 2shows a plan view of Fig. 1. Figs. 3 and at show longitudinal sectionalviews of modifications.

I provide an exterior and interior elec trode. The latter may be onepiece or consist of a number of pieces. The exterior electrode orelectrode part is indicated at a and the interior part is indecated atb. A suitable binder or binding material indicated at 0 can be appliedto secure the two parts against separation. The exterior or itscomponent parts can be of any shape or configuration required as forexample round, ova-l or otherwise as indicated in the various figures ofthe drawing.

The exterior electrode is hollow. The hole or opening in the exteriormay be wider at one end, it may be a tapered hole or it may be acylindrical hole widened at one end so another electrode fitting in theopening of the exterior electrode may be inserted. This is to preventthe inner electrode from falling through and holding same to theexterior electrode or having it supported or confined by any meanswithin t-he exterior electrode. Any space left open between the insideand outside electrodes may be filled in with tar, pitch or any suitablebinder or material or a combination of same, that will fill all openingsand spaces and connect both pieces or the interior, consisting of one ormore pieces, as solidly as possible with the exterior electrode toinsure a uniform prodnot.

The interior opening of the outside electrode and the form of theinterior electrode to be inserted therein, may be of any suitable shape,for instance as in sketch annexed, to fit into each other in any waythat may accomplish the purpose, in fact any design or shape or methodthat will hold them together. It may be done by inserting the innerelectrode either of one solid piece or a combination of pieces, toconform to the form of the hollow space in the interior of the electrodeand infuse the tar pitch or any other suitable binder or material, orcombination of same to fill in any open spaces afterward, substantiallyas described.

I claim:

1. The preparation of an electrode which consists in forming severalparts of the electrode so that one part can be inserted into another tobe retained therein and filling the spaces or interstices with suitablematerial, substantially as described.

2. As a new article of manufacture an electrode of several parts eachformed of carbonaceous mixture and placed one within another and havingthe spaces filled with suitable binding material.

v3. A new article of manufacture consisting of a number of electrodeparts of carbonaceous mixture suitably formed and placed one withinanother, the inner part being formed of several pieces and the outerpart being made to confine the inner one, said electrode having thespace between the parts filled with binding material.

4. The process of making combination electrodes, consisting inpreviously made electrode parts so formed that the interior electrodepart can be inserted into the exterior part and all spaces filled with asuit.- able material, to produce a uniformly solid combinationelectrode, substantially as described.

5. A new article of manufacture produced by forming two electrode partsof carbonaceous mixture an interior and an exterior and inserting theinterior electrode part into the exterior part and then filling the openproducing one solid combination electrode as a unlform article.

spaces with a suitable binding material, to make one solid uniformelectrode.

6. A new article of manufacture consist- In testimony whereof I havehereunto set ing of two electrode parts previously made my hand in thepresence of two subscribing 5 of carbonaceous mixture, consisting ofprop- Witnesses.

erly shaped inside electrode parts of one or more pieces inserted in acorrespondingly properly formed outside electrode part and Witnesses:

v RAPHAEL H. WOLFF.

confined therein, the open spaces infused CHRISTIAN ALMsTAEDT, 10 andfilled with a suitable binding material, W. C. HAUFF.

